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Discussion Starter · #1 ·
Hello all, my serpentine belt popped off yesterday while driving on the highway. I replaced the belt but it was thrown off as well. I noticed this thing I'm assuming is an idler has way too much up and down play and allows the belly to slip off. Can anyone tell me the correct name of this and how I can replace or tighten it. It has a threaded section but I don't know how to get it off. I have a 2003 grand cherokee limited 4.7 V8. Thank you in advance
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Are you talking about the water pump? If that's sloppy than you need to replace the pump. That will also require a coolant replacement so its a good idea to flush the coolant system while your in there, and consider a new thermostat as well for cheap insurance.

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Discussion Starter · #3 ·
Yes sir that's what I couldn't figure out what it was. Thank you for your help. I kept searching for idler and serpentine or harmonic balancer but nothing matched up.
 

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